More about the DonorsChoose.org Challenge, how you can participate, and how you can win awesome and valuable prizes for doing so. Any more questions? Just email Susie. The Challenge runs all through October, so open those wallets for the children!

Maybe you just don't have the expendable cash to blow on a new iPhone 3G. Maybe you're waiting for some of back-to-school sale. Whatever your reason, forget it right now. Because we're giving away one free iPhone 3G to a lucky survey taker.

It's pretty simple, you take a survey and we enter you into the contest to take home a new iPhone 3G. That's it!

So cross your fingers, take the survey and imagine a bold new world of location based social interaction.

Eligibility: Sweepstakes open to legal residents of the United States, excluding Vermont, Rhode Island, and Puerto Rico. Void where prohibited by law. Download the rest of the Official Rules here.